Population density is a measurement of population per unit area or unit volume. It is applied to living organisms, most of the time to humans, it is a key geographical term. In simple terms population density refers to the number of people living in an area per kilometer square. Population density is population divided by total land water volume, as appropriate. Low densities may lead to further reduced fertility; this is called the Allee effect after the scientist. Examples of the causes in low population densities include: Increased problems with locating sexual mates Increased inbreeding For humans, population density is the number of people per unit of area quoted per square kilometer or square mile; this may be calculated for a county, country, another territory or the entire world. The world's population is around 7,500,000,000 and Earth's total area is 510,000,000 square kilometers. Therefore, the worldwide human population density is around 7,500,000,000 ÷ 510,000,000 = 14.7 per km2. If only the Earth's land area of 150,000,000 km2 is taken into account human population density is 50 per km2.
This includes all continental and island land area, including Antarctica. If Antarctica is excluded population density rises to over 55 people per km2. However, over half of the Earth's land mass consists of areas inhospitable to human habitation, such as deserts and high mountains, population tends to cluster around seaports and fresh-water sources. Thus, this number by itself does not give any helpful measurement of human population density. Several of the most densely populated territories in the world are city-states and dependencies; these territories have a small area and a high urbanization level, with an economically specialized city population drawing on rural resources outside the area, illustrating the difference between high population density and overpopulation The potential to maintain the agricultural aspects of deserts is limited as there is not enough precipitation to support a sustainable land. The population in these areas are low. Therefore, cities in the Middle East, such as Dubai, have been increasing in population and infrastructure growth at a fast pace.
Cities with high population densities are, by some, considered to be overpopulated, though this will depend on factors like quality of housing and infrastructure and access to resources. Most of the most densely populated cities are in Southeast Asia, though Cairo and Lagos in Africa fall into this category. City population and area are, however dependent on the definition of "urban area" used: densities are invariably higher for the central city area than when suburban settlements and the intervening rural areas are included, as in the areas of agglomeration or metropolitan area, the latter sometimes including neighboring cities. For instance, Milwaukee has a greater population density when just the inner city is measured, the surrounding suburbs excluded. In comparison, based on a world population of seven billion, the world's inhabitants, as a loose crowd taking up ten square feet per person, would occupy a space a little larger than Delaware's land area; the Gaza Strip has a population density of 5,046 pop/km.
Although arithmetic density is the most common way of measuring population density, several other methods have been developed to provide a more accurate measure of population density over a specific area. Arithmetic density: The total number of people / area of land Physiological density: The total population / area of arable land Agricultural density: The total rural population / area of arable land Residential density: The number of people living in an urban area / area of residential land Urban density: The number of people inhabiting an urban area / total area of urban land Ecological optimum: The density of population that can be supported by the natural resources Demography Human geography Idealized population Optimum population Population genetics Population health Population momentum Population pyramid Rural transport problem Small population size Distance sampling List of population concern organizations List of countries by population density List of cities by population density List of city districts by population density List of English districts by population density List of European cities proper by population density List of United States cities by population density List of islands by population density List of U.
S. states by population density List of Australian suburbs by population density Selected Current and Historic City, Ward & Neighborhood Density Duncan Smith / UCL Centre for Advanced Spatial Analysis. "World Population Density". Exploratory map shows data from the Global Human Settlement Layer produced by the European Commission JRC and the CIESIN Columbia University
Avon is a village in Fulton County, United States. The population was 799 at the 2010 census, down from 915 at the 2000 census. Avon is located in northwestern Fulton County at 40°39′44″N 90°26′8″W. A small portion of the village extends west into Warren County. Illinois Route 41 passes through the village, leading north 21 miles to Galesburg and southwest 10 miles to Bushnell. According to the 2010 census, Avon has a total area of all land. Ira Woods and his family settled in Avon in 1835. Avon was named "Woodsville" from 1837 to 1843. In 1843, the town became big enough to ask for a post office; the name was changed to "Woodstock". On April 4, 1852, the United States Postmaster General gave the town the name of "Avon" to avoid confusion with another community in McHenry County, IL. Avon was once a thriving town, due in part to the railroad industry, by serving as a method of transporting cattle to the slaughterhouses in Chicago and as a stop between Chicago and Quincy; as of the census of 2000, there were 915 people, 375 households, 260 families residing in the village.
The population density was 2,065.3 people per square mile. There were 403 housing units at an average density of 909.6 per square mile. The racial makeup of the village was 98.80% White, 0.11% Native American, 0.11% Asian, 0.66% from other races, 0.33% from two or more races. Hispanic or Latino of any race were 0.77% of the population. There were 375 households out of which 29.1% had children under the age of 18 living with them, 52.3% were married couples living together, 12.5% had a female householder with no husband present, 30.4% were non-families. 26.7% of all households were made up of individuals and 15.2% had someone living alone, 65 years of age or older. The average household size was 2.44 and the average family size was 2.93. In the village, the population was spread out with 24.0% under the age of 18, 8.3% from 18 to 24, 25.0% from 25 to 44, 21.9% from 45 to 64, 20.8% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 93.9 males. For every 100 females age 18 and over, there were 86.3 males.
The median income for a household in the village was $33,417, the median income for a family was $38,819. Males had a median income of $30,167 versus $21,429 for females; the per capita income for the village was $16,257. About 9.9% of families and 11.7% of the population were below the poverty line, including 16.7% of those under age 18 and 10.8% of those age 65 or over. Ken Carpenter, radio and TV announcer
A census is the procedure of systematically acquiring and recording information about the members of a given population. The term is used in connection with national population and housing censuses; the United Nations defines the essential features of population and housing censuses as "individual enumeration, universality within a defined territory and defined periodicity", recommends that population censuses be taken at least every 10 years. United Nations recommendations cover census topics to be collected, official definitions and other useful information to co-ordinate international practice; the word is of Latin origin: during the Roman Republic, the census was a list that kept track of all adult males fit for military service. The modern census is essential to international comparisons of any kind of statistics, censuses collect data on many attributes of a population, not just how many people there are. Censuses began as the only method of collecting national demographic data, are now part of a larger system of different surveys.
Although population estimates remain an important function of a census, including the geographic distribution of the population, statistics can be produced about combinations of attributes e.g. education by age and sex in different regions. Current administrative data systems allow for other approaches to enumeration with the same level of detail but raise concerns about privacy and the possibility of biasing estimates. A census can be contrasted with sampling in which information is obtained only from a subset of a population. Modern census data are used for research, business marketing, planning, as a baseline for designing sample surveys by providing a sampling frame such as an address register. Census counts are necessary to adjust samples to be representative of a population by weighting them as is common in opinion polling. Stratification requires knowledge of the relative sizes of different population strata which can be derived from census enumerations. In some countries, the census provides the official counts used to apportion the number of elected representatives to regions.
In many cases, a chosen random sample can provide more accurate information than attempts to get a population census. A census is construed as the opposite of a sample as its intent is to count everyone in a population rather than a fraction. However, population censuses rely on a sampling frame to count the population; this is the only way to be sure that everyone has been included as otherwise those not responding would not be followed up on and individuals could be missed. The fundamental premise of a census is that the population is not known and a new estimate is to be made by the analysis of primary data; the use of a sampling frame is counterintuitive as it suggests that the population size is known. However, a census is used to collect attribute data on the individuals in the nation; this process of sampling marks the difference between historical census, a house to house process or the product of an imperial decree, the modern statistical project. The sampling frame used by census is always an address register.
Thus it is not known how many people there are in each household. Depending on the mode of enumeration, a form is sent to the householder, an enumerator calls, or administrative records for the dwelling are accessed; as a preliminary to the dispatch of forms, census workers will check any address problems on the ground. While it may seem straightforward to use the postal service file for this purpose, this can be out of date and some dwellings may contain a number of independent households. A particular problem is what are termed'communal establishments' which category includes student residences, religious orders, homes for the elderly, people in prisons etc; as these are not enumerated by a single householder, they are treated differently and visited by special teams of census workers to ensure they are classified appropriately. Individuals are counted within households and information is collected about the household structure and the housing. For this reason international documents refer to censuses of housing.
The census response is made by a household, indicating details of individuals resident there. An important aspect of census enumerations is determining which individuals can be counted from which cannot be counted. Broadly, three definitions can be used: de facto residence; this is important to consider individuals who have temporary addresses. Every person should be identified uniquely as resident in one place but where they happen to be on Census Day, their de facto residence, may not be the best place to count them. Where an individual uses services may be more useful and this is at their usual, or de jure, residence. An individual may be represented at a permanent address a family home for students or long term migrants, it is necessary to have a precise definition of residence to decide whether visitors to a country should be included in the population count. This is becoming more important as students travel abroad for education for a period of several years. Other groups causing problems of enumeration are new born babies, people away on holiday, people moving home around census day, people without a fixed address.
People having second homes because of working in another part of the country or retaining a holiday cottage are dif
Alexis is a village in Mercer and Warren counties in the U. S. state of Illinois. The population was 863 at the 2000 census; the Warren County portion of Alexis is part of the Galesburg Micropolitan Statistical Area, while the Mercer County portion is part of the Davenport–Moline–Rock Island, IA-IL Metropolitan Statistical Area. Alexis was called Alexandria, under the latter name was laid out in 1870 when the railroad was extended to that point. After learning of another Illinois town named Alexander, the founders wanted a new name. Around this time, Grand Duke Alexis was visiting the country. Alexis is located at 41°3′48″N 90°33′18″W; the village is situated along the boundary between Mercer counties. In the 2000 census, 499 of Alexis' 863 residents lived in Warren County and 364 lived in Mercer County. According to the 2010 census, Alexis has a total area of all land; as of the census of 2000, there were 863 people, 361 households, 246 families residing in the village. The population density was 1,778.6 people per square mile.
There were 383 housing units at an average density of 789.3 per square mile. The racial makeup of the village was 99.65% White, 0.12% from other races, 0.23% from two or more races. Hispanic or Latino of any race were 2.20% of the population. There were 361 households out of which 28.3% had children under the age of 18 living with them, 58.7% were married couples living together, 6.6% had a female householder with no husband present, 31.6% were non-families. 28.8% of all households were made up of individuals and 15.5% had someone living alone, 65 years of age or older. The average household size was 2.39 and the average family size was 2.94. In the village, the population was spread out with 24.3% under the age of 18, 7.0% from 18 to 24, 25.5% from 25 to 44, 24.1% from 45 to 64, 19.1% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 88.0 males. For every 100 females age 18 and over, there were 88.7 males. The median income for a household in the village was $36,705, the median income for a family was $46,364.
Males had a median income of $32,419 versus $19,000 for females. The per capita income for the village was $17,059. About 4.0% of families and 5.9% of the population were below the poverty line, including 4.0% of those under age 18 and 3.8% of those age 65 or over. Alexis Fire Equipment a manufacturer of fire engines and fire fighting related equipment is the village's largest employer. Alexis Police Department Mercer County Sheriff's Office Warren County Sheriff's Office
1930 United States Census
The Fifteenth United States Census, conducted by the Census Bureau one month from April 1, 1930, determined the resident population of the United States to be 122,775,046, an increase of 13.7 percent over the 106,021,537 persons enumerated during the 1920 Census. The 1930 Census collected the following information: address name relationship to head of family home owned or rented if owned, value of home if rented, monthly rent whether owned a radio set whether on a farm sex race age marital status and, if married, age at first marriage school attendance literacy birthplace of person, their parents if foreign born: language spoken at home before coming to the U. S. year of immigration whether naturalized ability to speak English occupation and class of worker whether at work previous day veteran status if Indian: whether of full or mixed blood tribal affiliationFull documentation for the 1930 census, including census forms and enumerator instructions, is available from the Integrated Public Use Microdata Series.
The original census enumeration sheets were microfilmed by the Census Bureau in 1949. The microfilmed census is located on 2,667 rolls of microfilm, available from the National Archives and Records Administration. Several organizations host images of the microfilmed census online, digital indices. Microdata from the 1930 census are available through the Integrated Public Use Microdata Series. Aggregate data for small areas, together with electronic boundary files, can be downloaded from the National Historical Geographic Information System. 1930 Census Questions Hosted at CensusFinder.com 1931 U. S Census Report Contains 1930 Census results Historic US Census data 1930Census.com: 1930 United States Census for Genealogy & Family History Research 1930 Interactive US Census Find stories and more attached to names on the 1930 US census
Los Angeles Dodgers
The Los Angeles Dodgers are an American professional baseball team based in Los Angeles, California. The Dodgers compete in Major League Baseball as a member club of the National League West division. Established in 1883 in Brooklyn, New York, the team moved to Los Angeles before the 1958 season, they played for four seasons at the Los Angeles Memorial Coliseum before moving to their current home of Dodger Stadium in 1962. The Dodgers as a franchise have won 23 National League pennants. 11 NL MVP award winners have played for the Dodgers. The team has produced 18 Rookie of the Year Award winners, twice as many as the next closest team, including four consecutive from 1979 to 1982 and five consecutive from 1992 to 1996. In the early 20th century, the team known as the Robins, won league pennants in 1916 and 1920, losing the World Series both times, first to Boston and Cleveland. In the 1930s, the team changed its name to the Dodgers, named after the Brooklyn pedestrians who dodged the streetcars in the city.
In 1941, the Dodgers captured their third National League pennant, only to lose to the New York Yankees. This marked the onset of the Dodgers–Yankees rivalry, as the Dodgers would face them in their next six World Series appearances. Led by Jackie Robinson, the first black Major League Baseball player of the modern era. Following the 1957 season the team left Brooklyn. In just their second season in Los Angeles, the Dodgers won their second World Series title, beating the Chicago White Sox in six games in 1959. Spearheaded by the dominant pitching style of Sandy Koufax and Don Drysdale, the Dodgers captured three pennants in the 1960s and won two more World Series titles, sweeping the Yankees in four games in 1963, edging the Minnesota Twins in seven in 1965; the 1963 sweep was their second victory against the Yankees, their first against them as a Los Angeles team. The Dodgers won four more pennants in 1966, 1974, 1977 and 1978, but lost in each World Series appearance, they went on to win the World Series again in 1981, thanks in part to pitching sensation Fernando Valenzuela.
The early 1980s were affectionately dubbed "Fernandomania." In 1988, another pitching hero, Orel Hershiser, again led them to a World Series victory, aided by one of the most memorable home runs of all time, by their injured star outfielder Kirk Gibson coming off the bench to pinch hit with two outs in the bottom of the ninth inning of game 1, in his only appearance of the series. The Dodgers won the pennant in 2017 and 2018, but lost the World Series to the Houston Astros and Boston Red Sox respectively; the Dodgers share a fierce rivalry with the San Francisco Giants, the oldest rivalry in baseball, dating back to when the two franchises played in New York City. Both teams moved west for the 1958 season; the Brooklyn Dodgers and Los Angeles Dodgers have collectively appeared in the World Series 20 times, while the New York Giants and San Francisco Giants have collectively appeared 20 times. The Giants have won two more World Series. Although the two franchises have enjoyed near equal success, the city rivalries are rather lopsided and in both cases, a team's championships have predated to the other's first one in that particular location.
When the two teams were based in New York, the Giants won five World Series championships, the Dodgers one. After the move to California, the Dodgers have won five in Los Angeles, the Giants have won three in San Francisco; the Dodgers were founded in 1883 as the Brooklyn Atlantics, taking the name of a defunct team that had played in Brooklyn before them. The team joined the American Association in 1884 and won the AA championship in 1889 before joining the National League in 1890, they promptly won the NL Championship their first year in the League. The team was known alternatively as the Bridegrooms, Superbas and Trolley Dodgers before becoming the Brooklyn Dodgers in the 1930s. In Brooklyn, the Dodgers won the NL pennant several times and the World Series in 1955. After moving to Los Angeles, the team won National League pennants in 1959, 1963, 1965, 1966, 1974, 1977, 1978, 1981, 1988, 2017, 2018, with World Series championships in 1959, 1963, 1965, 1981 and 1988. In all, the Dodgers have appeared in 11 in Los Angeles.
For most of the first half of the 20th century, no Major League Baseball team employed an African American player. Jackie Robinson became the first African American to play for a Major League Baseball team when he played his first major league game on April 15, 1947, as a member of the Brooklyn Dodgers; this was due to general manager Branch Rickey's efforts. The religious Rickey's motivation appears to have been moral, although business considerations were a factor. Rickey was a member of The Methodist Church, the antecedent denomination to The United Methodist Church of today, a strong advocate for social justice and active in the American Civil Rights Movement; this event was the harbinger of the integration of professional sports in the United States, the concomitant demise of the Negro Leagues, is regarded as a key moment in the history of the American Civil Rights Movement. Robinson was an exceptional player, a speed